Python: use the same include dir everywhere
Python: use the same include dir everywhere

Use the non-suffxed include dir even when building for secondary arch.
This greatly simplifies things for python packages with native code.

Begasus/haikuports,nielx/haikuports,Begasus/haikuports,koletzky/haikuports,miqlas/haikuports,nielx/haikuports,haikuports/haikuports,haikuports/haikuports,miqlas/haikuports,nielx/haikuports,miqlas/haikuports,haikuports/haikuports,Begasus/haikuports,haikuports/haikuports,Begasus/haikuports,moochris/haikuports,Begasus/haikuports,moochris/haikuports,moochris/haikuports,koletzky/haikuports,haikuports/haikuports,koletzky/haikuports